/* ============================================================
   article.css — Reusable styles for academic/technical articles
   Include via extraStyles=["/styles/article.css"] on slug pages
   ============================================================ */

/* ---- Reading Measure & Wide Technical Content ---- */
.article-page {
  --article-measure: 640px;
}

.reader-wide .article-page {
  --article-measure: 100%;
}

.article-page > .back-link {
  margin-left: max(0px, calc((100% - var(--article-measure)) / 2));
}

.article-page .article__header {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: min(100%, 1040px);
  margin-inline: auto;
  text-align: center;
}

.article-page .markdown-content {
  display: grid;
  grid-template-columns:
    minmax(0, 1fr)
    minmax(0, var(--article-measure))
    minmax(0, 1fr);
}

.article-page .markdown-content > * {
  grid-column: 2;
  min-width: 0;
}

.article-page .markdown-content > :is(
  .katex-display,
  figure,
  img,
  p:has(> img:only-child)
) {
  grid-column: 1 / -1;
}

/* Hasta cinco columnas siguen la medida de lectura; las tablas más densas usan el ancho técnico. */
.article-page .markdown-content > table {
  grid-column: 2;
  justify-self: center;
}

.article-page .markdown-content > table:has(tr > :nth-child(6)) {
  grid-column: 1 / -1;
  justify-self: stretch;
  width: 100%;
}

/* ---- KaTeX Display Math ---- */
.markdown-content .katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.8rem 0;
  margin: 1.5rem 0;
}

.markdown-content .katex-display > .katex {
  white-space: nowrap;
}

.markdown-content .katex {
  font-size: 1.1em;
  color: var(--color-text);
}

/* ---- Footnotes ---- */
.markdown-content .footnotes {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}

.markdown-content .footnotes ol {
  padding-left: 1.5rem;
}

.markdown-content .footnotes li {
  margin-bottom: 0.75rem;
}

.markdown-content .footnotes li p {
  margin: 0;
}

/* Footnote back-arrow */
.markdown-content .footnotes a[href^="#fnref"] {
  text-decoration: none;
  margin-left: 0.3rem;
  font-size: 0.85em;
}

/* Superscript footnote links in text */
.markdown-content a[href^="#fn"] {
  text-decoration: none;
  color: var(--color-primary);
  font-weight: 600;
}

.markdown-content sup a {
  text-decoration: none;
}

/* ---- Figures & Captions ---- */
.markdown-content figure {
  margin: 2rem auto;
  text-align: center;
  max-width: 100%;
}

.markdown-content figure img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
}

.markdown-content figcaption {
  margin-top: 0.75rem;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  font-style: italic;
  line-height: 1.5;
  max-width: 85%;
  margin-left: auto;
  margin-right: auto;
}

/* ---- Tables ---- */
.markdown-content table {
  width: fit-content;
  max-width: 100%;
  border-collapse: collapse;
  margin: 1.5rem auto;
  font-size: 0.92rem;
  overflow-x: auto;
  display: block;
}

.markdown-content thead th {
  background: var(--color-surface);
  font-weight: 600;
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 2px solid var(--color-border);
}

.markdown-content tbody td {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

.markdown-content tbody tr:nth-child(even) {
  background: var(--color-surface);
}

/* ---- Minipage side-by-side images ---- */
.markdown-content .minipage {
  display: inline-block;
  width: 48%;
  vertical-align: top;
  text-align: center;
  margin: 0 0.5%;
}

.markdown-content .minipage img {
  max-width: 100%;
  height: auto;
}

/* ---- Blockquotes (for callouts/notes) ---- */
.markdown-content blockquote {
  border-left: 3px solid var(--color-primary);
  padding: 0.5rem 1rem;
  margin: 1.5rem 0;
  background: var(--color-surface);
  border-radius: 0 6px 6px 0;
  color: var(--color-text-secondary);
}

/* ---- Expanded previews for images, tables and code ---- */
html.content-preview-open {
  overflow: hidden;
}

.content-preview-source {
  cursor: zoom-in;
}

.content-preview-source:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
}

.content-preview-trigger {
  position: fixed;
  z-index: 160;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 6px 18px rgb(0 0 0 / 0.12);
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.content-preview-trigger[hidden] {
  display: none;
}

.content-preview-trigger:hover,
.content-preview-trigger:focus-visible {
  color: var(--color-primary);
  background: var(--color-bg-alt);
  border-color: var(--color-primary);
}

.content-preview-trigger:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.content-preview-trigger svg,
.content-preview-dialog__close svg {
  width: 18px;
  height: 18px;
}

.content-preview-dialog {
  inset: 0;
  box-sizing: border-box;
  width: 100%;
  max-width: none;
  height: 100vh;
  height: 100dvh;
  max-height: none;
  margin: 0;
  padding: clamp(8px, 2vw, 24px);
  overflow: hidden;
  color: var(--color-text);
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.content-preview-dialog[open] {
  display: grid;
  place-items: center;
}

.content-preview-dialog::backdrop {
  background: rgb(0 0 0 / 0.76);
  backdrop-filter: blur(2px);
}

.content-preview-dialog__panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  width: min(1280px, 100%);
  max-height: calc(100dvh - 32px);
  min-width: 0;
  overflow: hidden;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 22px 70px rgb(0 0 0 / 0.42);
}

.content-preview-dialog__toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-4);
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: var(--font-semibold);
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  text-transform: uppercase;
  border-bottom: 1px solid var(--color-border);
}

.content-preview-dialog__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  color: var(--color-text-secondary);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.content-preview-dialog__close:hover,
.content-preview-dialog__close:focus-visible {
  color: var(--color-primary);
  background: var(--color-bg-alt);
  border-color: var(--color-border);
}

.content-preview-dialog__close:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.content-preview-dialog__viewport {
  min-width: 0;
  min-height: 0;
  overflow: auto;
  background: var(--color-surface);
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

.content-preview-dialog__viewport:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

.content-preview-dialog__body.markdown-content {
  display: block;
  width: 100%;
  max-width: none;
  max-height: none;
  padding: 0;
  overflow: visible;
  font-size: var(--text-base);
  background: transparent;
}

dialog.content-preview-dialog[data-preview-kind="image"] .content-preview-dialog__viewport {
  display: grid;
  place-items: center;
  padding: clamp(12px, 2vw, 24px);
}

dialog.content-preview-dialog[data-preview-kind="image"] .content-preview-dialog__body.markdown-content {
  display: grid;
  place-items: center;
}

dialog.content-preview-dialog .content-preview-dialog__body.markdown-content > img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: calc(100dvh - 150px);
  margin: 0;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

dialog.content-preview-dialog[data-preview-kind="table"] .content-preview-dialog__viewport,
dialog.content-preview-dialog[data-preview-kind="code"] .content-preview-dialog__viewport {
  padding: var(--space-5);
}

dialog.content-preview-dialog[data-preview-kind="table"] .content-preview-dialog__body.markdown-content,
dialog.content-preview-dialog[data-preview-kind="code"] .content-preview-dialog__body.markdown-content {
  width: max-content;
  min-width: 100%;
}

dialog.content-preview-dialog .content-preview-dialog__body.markdown-content > table {
  display: table;
  width: max-content;
  min-width: 100%;
  max-width: none;
  margin: 0;
  overflow: visible;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

dialog.content-preview-dialog .content-preview-dialog__body.markdown-content > pre {
  width: max-content;
  min-width: 100%;
  max-width: none;
  margin: 0;
  overflow: visible;
}

.content-preview-dialog__caption {
  max-height: min(24vh, 160px);
  margin: 0;
  padding: var(--space-3) var(--space-4);
  overflow: auto;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--color-text-secondary);
  text-align: left;
  background: var(--color-background);
  border-top: 1px solid var(--color-border);
}

@media (max-width: 720px) {
  .article-page > .back-link {
    margin-left: 0;
  }

  .article-page .markdown-content {
    grid-template-columns: minmax(0, 1fr);
  }

  .article-page .markdown-content > * {
    grid-column: 1;
  }

  .article-page .markdown-content > table,
  .article-page .markdown-content > table:has(tr > :nth-child(6)) {
    grid-column: 1;
  }

  .content-preview-trigger {
    display: none;
  }

  .content-preview-dialog {
    padding: var(--space-2);
  }

  .content-preview-dialog__panel {
    width: 100%;
    max-height: calc(100dvh - 16px);
    border-radius: var(--radius-sm);
  }

  .content-preview-dialog__toolbar {
    min-height: 44px;
    padding-left: var(--space-3);
  }

  dialog.content-preview-dialog[data-preview-kind="table"] .content-preview-dialog__viewport,
  dialog.content-preview-dialog[data-preview-kind="code"] .content-preview-dialog__viewport {
    padding: var(--space-3);
  }

  .content-preview-dialog__caption {
    padding: var(--space-3);
    font-size: var(--text-xs);
  }
}

@media (hover: none) {
  .content-preview-trigger {
    display: none;
  }
}

/* ---- Graficas nativas (graphs.js) ---- */
.graph-hbar,
.graph-flow {
  --graph-bar: #2563eb;
  margin: 2rem 0;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

[data-theme="dark"] .graph-hbar,
[data-theme="dark"] .graph-flow {
  --graph-bar: #60a5fa;
}

.graph-duo {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin: 2rem 0;
}

.graph-duo .graph-hbar,
.graph-duo .graph-flow {
  margin: 0;
}

.graph__head {
  margin-bottom: var(--space-5);
}

.graph__title {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-text);
  text-align: left;
}

.graph__subtitle {
  margin: var(--space-1) 0 0;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: left;
}

.graph__rows {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.graph__row {
  display: grid;
  grid-template-columns: minmax(90px, 9em) minmax(0, 1fr) 4.5em;
  align-items: center;
  gap: var(--space-3);
}

.graph__label {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-align: left;
  overflow-wrap: anywhere;
}

.graph__track {
  display: block;
  height: 14px;
  background: var(--color-bg-alt);
  border-radius: 3px;
  overflow: hidden;
}

.graph__fill {
  display: block;
  width: 0;
  height: 100%;
  background: var(--graph-bar);
  border-radius: 3px;
  transition: width 0.9s cubic-bezier(0.4, 0, 0.2, 1);
}

.graph--in .graph__fill {
  width: var(--graph-w);
}

.graph__value {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.graph__note {
  margin: var(--space-5) 0 0;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-style: italic;
  color: var(--color-text-muted);
  text-align: left;
}

/* Etapas numeradas */
.graph__steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.graph__step {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.graph__step-head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.graph__step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  color: var(--graph-bar);
  border: 1px solid var(--color-border);
  border-radius: 50%;
}

.graph__step-name {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  color: var(--color-text);
}

.graph__step-desc {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
  text-align: left;
}

@media (max-width: 720px) {
  .graph-duo {
    grid-template-columns: minmax(0, 1fr);
  }

  .graph__row {
    grid-template-columns: minmax(72px, 7em) minmax(0, 1fr) 4em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .graph__fill {
    transition: none;
  }
}

/* ---- RoadGuard · Chart.js data cards ---- */
.markdown-content figure.roadguard-chart {
  --roadguard-chart-blue: #526b7b;
  --roadguard-chart-teal: #46766f;
  --roadguard-chart-amber: #a56f35;
  --roadguard-chart-red: #9d514c;
  width: min(100%, 980px);
  margin: 2.5rem auto;
  padding: clamp(1.1rem, 2.8vw, 1.75rem);
  text-align: left;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

[data-theme="dark"] .markdown-content figure.roadguard-chart {
  --roadguard-chart-blue: #8ba8b9;
  --roadguard-chart-teal: #7db4aa;
  --roadguard-chart-amber: #d2a15f;
  --roadguard-chart-red: #d88a83;
}

.roadguard-chart__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.roadguard-chart__eyebrow {
  display: block;
  margin-bottom: var(--space-2);
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: var(--font-bold);
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.roadguard-chart__header h4 {
  margin: 0;
  font-family: var(--font-body);
  font-size: clamp(var(--text-base), 2vw, var(--text-lg));
  color: var(--color-text);
}

.roadguard-chart__header p {
  margin: var(--space-1) 0 0;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.roadguard-chart__metric {
  flex: 0 0 auto;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.roadguard-chart__metric strong {
  margin-left: var(--space-1);
  font-family: var(--font-mono);
  font-weight: var(--font-bold);
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

.roadguard-chart__canvas {
  position: relative;
  width: 100%;
  height: clamp(330px, 46vw, 430px);
}

.roadguard-chart--policy .roadguard-chart__canvas {
  height: clamp(370px, 48vw, 440px);
}

.roadguard-chart--stress .roadguard-chart__canvas {
  height: clamp(300px, 40vw, 370px);
}

.markdown-content figure.roadguard-chart figcaption {
  max-width: none;
  margin: var(--space-4) 0 0;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-style: normal;
  color: var(--color-text-muted);
  text-align: left;
}

@media (max-width: 720px) {
  .markdown-content figure.roadguard-chart {
    width: 100%;
    padding: var(--space-4);
  }

  .roadguard-chart__header {
    flex-direction: column;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
  }

  .roadguard-chart__metric {
    white-space: normal;
  }

  .roadguard-chart__canvas {
    height: 350px;
  }

  .roadguard-chart--policy .roadguard-chart__canvas {
    height: 430px;
  }

  .roadguard-chart--stress .roadguard-chart__canvas {
    height: 330px;
  }
}

/* ---- BGG Review Intelligence · process and Chart.js cards ---- */
.article-page .markdown-content > :is(.bgg-pipeline, .bgg-chart-grid) {
  grid-column: 1 / -1;
}

.bgg-pipeline {
  width: min(100%, 1080px);
  margin: 2.5rem auto;
  padding: clamp(1.1rem, 2.8vw, 1.75rem);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.bgg-pipeline__header {
  max-width: 680px;
  margin-bottom: var(--space-6);
}

.bgg-pipeline__header > span,
.bgg-chart__header span {
  display: block;
  margin-bottom: var(--space-2);
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: var(--font-bold);
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.bgg-pipeline__header h3,
.bgg-chart__header h4 {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
}

.bgg-pipeline__header h3 {
  font-size: clamp(var(--text-lg), 2.4vw, var(--text-xl));
}

.bgg-pipeline__header p,
.bgg-chart__header p {
  margin: var(--space-1) 0 0;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.bgg-pipeline ol {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.bgg-pipeline li {
  position: relative;
  min-width: 0;
  padding: var(--space-5) var(--space-4) 0 0;
  border-top: 1px solid var(--color-border);
}

.bgg-pipeline li::before {
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  content: '';
  background: var(--color-text-secondary);
  border-radius: 50%;
}

.bgg-pipeline li > span {
  display: block;
  margin-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.bgg-pipeline strong {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text);
}

.bgg-pipeline li p {
  margin: var(--space-2) 0 0;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  line-height: var(--leading-relaxed);
  color: var(--color-text-muted);
}

.bgg-chart-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  width: min(100%, 1080px);
  margin: 2.5rem auto;
}

.markdown-content figure.bgg-chart {
  --bgg-chart-primary: #526b7b;
  --bgg-chart-secondary: #46766f;
  --bgg-chart-muted: #a9aaa5;
  width: 100%;
  margin: 0;
  padding: clamp(1rem, 2.4vw, 1.5rem);
  text-align: left;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

[data-theme="dark"] .markdown-content figure.bgg-chart {
  --bgg-chart-primary: #8ba8b9;
  --bgg-chart-secondary: #7db4aa;
  --bgg-chart-muted: #555752;
}

.bgg-chart__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 116px;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.bgg-chart__header h4 {
  font-size: var(--text-base);
}

.bgg-chart__header > strong {
  flex: 0 0 auto;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text);
  white-space: nowrap;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-variant-numeric: tabular-nums;
}

.bgg-chart__canvas {
  position: relative;
  width: 100%;
  height: 290px;
}

.markdown-content figure.bgg-chart figcaption {
  max-width: none;
  min-height: 3em;
  margin: var(--space-4) 0 0;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-style: normal;
  color: var(--color-text-muted);
  text-align: left;
}

@media (max-width: 900px) {
  .bgg-pipeline ol {
    grid-template-columns: 1fr;
  }

  .bgg-pipeline li {
    display: grid;
    grid-template-columns: 2rem minmax(0, 1fr);
    gap: var(--space-3);
    padding: var(--space-4) 0 var(--space-4) var(--space-4);
    border-top: 0;
    border-left: 1px solid var(--color-border);
  }

  .bgg-pipeline li::before {
    top: var(--space-5);
    left: -4px;
  }

  .bgg-pipeline li > span {
    margin: 0;
  }

  .bgg-pipeline li p {
    max-width: 42rem;
  }

  .bgg-chart-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .bgg-chart__header,
  .markdown-content figure.bgg-chart figcaption {
    min-height: 0;
  }
}

@media (max-width: 560px) {
  .bgg-chart__header {
    flex-direction: column;
  }

  .bgg-chart__canvas {
    height: 300px;
  }
}